Automotive tractor



G. L. SCHOFELD.

AUTOMOTIVE TRACIOR.

APPLICATION min JuLYv M1918.

Patented' ot. 19,.1920.

7 SHEETS-*SHEE 3.

G. L. SCHOFIELILy Auo'morlvi TRACTOR. APPLlcAnon FILED lun-1,1913;

Patented Oct. 19, 1920.

7- SHEETS-SHEET 4.

SCHOFIELD, AUTOMOTIVE TRACTOR; APPLICATION F1L ED'1uLY1.1918.

7 SHEETS-SHEET 5.

A kN

A TTORNEY G. L SCHOFIELD. AuToMoTlvfE TRACTOR.A

I APPLICATION 'FILED JULY I, 1918. 1 ,3 56 ,475, Patented Oct. 19, 1920.1 SHEETS-SHEET 7.

i a' citizenof .the United States,iiesidiiigiat,`

UNITED STATES raiirrii OFFICE.

i GEORGE- n. fscnoiiin'rn. or' Kansas CITY, ivIissoUiiI.

AUTOMOTIVE TRACTOR.

viip'pii'eaaoi1- inea I uiy i',

To 'all ahem Muay Concern.'

Beit known that I, GEORGE L. SCHorELD,

Kansas Cityf in the county of Jackson and j 'Sta'te'o'f Missouri; haveinvented'certain new and.' useful I'inprovementsv 'in 'AutomotiveTractors; and'I do declare'the following 'to be a fullclear, and exactdescriptionv ofthe invei'itioii', such. as will 'enable .others skillediii the art to ,which it appeitains to .make and use the saine.'reference beingI had to the accompani'fing drawings, and. tothe lettersand figures of reference finarked thereon, which formL a part of thisspecification.

This'i'iiveiitioh' relates to, a 'tractor' of such constriic-t-ioii'thatthe motor powermav be supplied bythe .driving element of a motor vehicle4temporarily.supported bythe tractor "frame, it b'eing one ofthepurposes of .l this invention' tosc )associate ,the motor ve-r ;hicleand the `tractor frame that. when the two are' brought .intocoperativlsr relation7 a substantially unitary structure is provided;

the r'notr car merely providing the power.

lith the contemplated arrangement. the

motor vehicle mayfalterna'tely carry out its usualfunctions'asv apleasure car orthe like or serve 'as the motorv power for the tractor.without disturbingthejessential elements of the motor vehicle. e

Heretoforeit has generally been the practiceto construct` a. motorvehicle chassis as well as a tractor frame as rigid as possibleconsistent with the weight permitted; theinequalities of the road`surfacebeing compensated for by springs'or some equivalent meansindependent of the frame. this being necessary in order' to"maiiitain'the transmission shaft' in correct alinement. l

I have.' provided a tractor frame consisting of sideA sills'aiid crosssillsfsome at least'ofwhich' having an inherent tendency t'o lex whenthe wheels "strikey inequalitiesin thev surface over Ywhich the'tractorv travels.

The inherent iexibility of tlie frame permits ,the wheels at all timesto contact with the ground irrespective vof any inequalities thereon, acondition deemed quite essential to the successful operation of atractor.

'In' the drawings: Figure I is a side .elevation of an automotivetractor-embodying my improvements.

Fig. II is a rear view of the same.

Fig. III is a longitudinal veitical Asection s peqiaeatipn of Letters.Patent 'of the automobile from the frame.

Fig'IV is aperspective view 'of the frame.

Fig. V is aplan'view of the frame, incliiding'the cooling mechanismr andan aux-- iliary power attachment. s f

F ig.l VI'is an elevational view, partly in section of the reai axle anddrive wheels.

Fig. V171 is' a similar. view of the'front axle. -4

Fig. YIIIis a horizontal sectioirof the steering rack box. anda portionof the rack .partly ,in section.

Fig. 'sa 'detail perspective view of the steering rack box.`

Fig. is a detail-view,4 partly-'in sectionA ofy one of thel-aiitoi`nobile wheels `and its .uni.

'versal flange.

. F iglXI is a det-ailv perspective view of the flange' Fig. 'XII isa.dtail perspective view of a float-ing idler on the' drive belt,yconnecting i Patented 06u19, 1920.' 191s. 'semi No. 2452311, y

the automobile wheel with the drive'shaft ofthe frame.

Fig. XIII vis an enlarged det-ail.perspective view ofthe jack forelevating the rear Fig.' X is avertical section-of thev ack illustratingthe mo'iinting of the toggle ariii.

' Fig. XV is a detail perspective vie-w lof the `universal jack saddleon the. car axle.

Fig. I is an en d view of the same'illi'if' trating the positions oftheaxleiaiid 'ja'c'li saddle members.

Fig. XYHisa perspective .view of the toggle shaft 'screw and itsmounting.

y r v Fig.a\\ III is adetail-perspeotive view of a ]ackshaft andV itsuniversal bearings.

"Fig XX is alongitudinal section of part y of a jack shaft and itsbearings.

7. .h i u Fig. X is 'a perspective view Vof the Jack ,shaftbearing-illustrating its mounting on its attachment to the frame.

Fig. XXV is a detail perspective -view of one `of .the stops at thefront of the frame.

.pf part of the fan post and its *Fig XXVI is a vertical section of the'.front cross beam and parts of the tow bar Fig. XXVIII is a perspectiveview .of the upper end of the fan post showing the fan bearing. i

lFig.A XXIX isa longitudinal Section of the transmission case. -l l Fig.XXX is a cross `section'of the transmission case. j

The tractor frame is shown as consisting of side sills and end sills,each of which is preferably constructed so as toA have an inherenttendency to flex, althoughunder some condition' only one set, forexample, the side sills may flex. j l

j The side sills 2 (see Figs. V 'and VI) may consist -of pairs of anglebars 3, the'upstanding vertical flanges 4 being spaced apart to providegrooved retaining run-ways to guide the wheels of the motor vehicle onto horizontal flanges 6 which constitute the floors of the run-ways. Thehorizontal flanges 6 of the side sills rest upon the top horizontalflanges 7 of the end sills 8 and 9 which 'are fastened with respect tothe 'angles of the side sills so that their vertical flanges 11 on theouter edges of the angles project downwardly as shown. l

Each angle piece of an end sill is attached -to an angle piece of a sidesill preferably by a single fastening device to unite the parts in anintegral structure, and at the same time assist in the flexibility 'ofthe frame because of the single pointV connection, although a singlepoint connection may not be assembled under all conditions.

The end sill 8 extends beyond the sides of the side sills 2, and fixedin the downwardly facing channel at each end of the sill preferably bybolts 13, are bearings 14e-44', (Figs. VI and XXI) for receiving theinner'end of a stub axle 15 that projects beyond the end of the end silland carries a tractio'n vwheel 16-of any suitable type. The bearings14-14 are halved horizontally andthe lower part of each provided with astud 17 which projects into the bearing channell and is adapted forseating in an aperture 18 or socket 19 in the stub axle 15. The socket19 is arrai'igcd at the center of the axle so that theapeiture 13 mayreceive the stud 17 of the inner bearing member or, when the axle isreversed, may receive the Cotter .pin 2O that holds the traction wheelon the axle. lVith this construction should the axle wear. it ma)7 bereversed and tie parts fit as described, with the Cotter pin occupyingthe aperture which had previously' received the stud 17 ofthe innerbearing. l

At the rear ofthe frame is a cross bar 22 1 ,sacara a screw shaft 27isrevolubly mounted. Bar

22 also carries a yoke 28 (Fig. II) comprising hangers 29, which arebolted to thebar 22 and a cross bolt 31 that is carried by said hangers.Pivotallymounted on a cross beam 34 (Fig. V) that is suspended from thelongitudinal beams 2 at about the center of the frame, by bolts 35, is adraw bar 36, having a yoke 37 at its forward-end straddling the bar 34and connected thereto by a bolt 38. The rear end of the bar 36 extendsthrough the guide yoke 28 and has apertures 39, through whicha hitch fora plow or other implement orvehicle (not shown) may be attached to thetractor frame. It is apparent that the pivotal 'mounting of the draw baraffords automatic the bar, is an angle strip 41. Fixed to andl suspendedfrom the vert-ical flange of each angle strip 41 is a journal` box 42(Figs.

.XI/K XX) comprising an uppery member 43 which is attached to the sideof the angle flange, and a lower member 44, which is suspended from theln'iernl'ler 43 by bolts Likewise fixed to the vertical flange of theinner longitudinal frame member 3 is the Iupper portion 46 of a journalbox 42, the

lower member 47 of which is attached to the upper member by bolts 49(Fig. V), which extend through apertures 50 and 51 in the journal' box42. Each of the lower members of bushings 52 in which the jack shaft ismounted is provided with a socket 58 for receiving a stud 59 formed.integral with the lower bearing members 44 andy 47 to prevent thebushings from rotating in the boxes. The fit of studs 59 in theirsockets is sufficiently free to permit universal movement of the jackshaft that carries out the flexible scheme of the main frame..

The outer end of each jack shaft is tapered to form a cone bearing for adriving pinion 61 that is fixed on the shaft and heldin place by a nut62 that threads onto the end of the shaft. Each pinion 61 meshes with aninternal gear 64 (Fig. V) fixed to the inner individual *jack shaft. Asprocket wheel.

66 is attached to each jack shaft, preferably by bolts 67 that extendthrough the sprocket assembled.

l 'l-he'slprocket wheel 71 preferably attached to thecarwheel through aflange 7 2 (Figs. X and"XI) that is adapted for universal application towheels of this character so .to the wheel of any motor car.

that the flange may -be made up as stock equipment and easilyandquicklyapplied The preferred construction .of the 4flalnge comprises af-rusto-conical body having an annular rim 73 `at its base provided onits face with bosses 74, having radial sockets 75 for receiving thespokes 76 ofthe motor car wheel,`

the socket bosses being arranged at determined intervals correspondingto the spacing ofthe motor car wheel. In the present drawings, I haveillustrated six bosses,

4 which are adapted for application to alternate spokes of atwelve-spoke wheel, al-

' though it is apparent that this number of sockets is not essential. Toattaclfi the flange to the wheels, I provide clips` 77, which lit overthe wheel spokes and-extend through apertures 78 in the flange rim 7,3and se'- cured by nuts 7 9'. The sprocket Wheel 71 is Apreferablyattached to the flange by bolts 80, which. extend through the'body ofthe sprocket wheel and through an inturned` l .rim 81 at the smallerv'end of the flange, .the

sprocket wheel and the end of the flange being open to accommodate thehub cap 82 of the motor car wheel.

- 1With the parts assembled and power I applied from the motor car tothe frame,

and the langle strip 41.

'the dragon the belt 70 is upwardly lon the rear run of the belt.Consequently the rear run is taut, while the forward run is loose andmay rattlev to throw thev belt from the sprocket wheel or permit thebelt to slip. To obviate any such disadvantage, I 4have provided afloating idler, preferably comarising a triangular frame 84 (Figs. I andII) which may be constructed of straps 85`86 and 87 The straps arearranged in pairs, as illustrated, with the straps 85 and 86. 1'ivotally mounted on a bolt 88 carried by a block 89 that is anchoredbetween the vertical flanges of one of the side beams 2 The rear ends ofthe 4straps 86 and 87 are connected by a bolt 90, carrying an idlersprocket wheel 91, on

a thimble 91, straps 85 and 87 are connected I i by' a bolt 92 andrevolubly mou'nted on the bolt 92 is an fuller sprocket wheel 93. The 1aps 85 yand 87 'i of ,several posite idler against the loose run of thebelt and avoid lost motion of the belt relative to its sprocket wheels.

While the front wheels of the motor car may rest on the frame beams whenthe parts are assembled, it is apparent that the rear wheelsmust be outof contact with the frame or the car would be driven on over thefroiitof the frame. I provide against such contingency by elevating therear end of themotor car after it assumes its position on' the mainframe, by mechanism of which the `following is the preferred form:

Journaled in ybearings-95 that 'are prefer ably suspended from the sidebeams 2 of the main frame., is a transverse shaft 96 (Figs. I, V and/XIII). Fixed on said' shaft, adjacent to each side beam, is a splittoggle block 97, the members of which are connected rigidly by bolts 98to clamp the block to the shaft. Pivotally connected with each block, bya bolt 99, are toggle arms 100, having edge sockets 101, adapted to fitsnugly over the shaft 96 when the toggle, composed of the arms 100 andblock 97, is straightened as presently described. The upper ends of thearms 100 are tied to a centering head 104 which is pivotally connectedwith an adjacent frame beam by` a Abolt 106. rIhe bolt'99 which connectsthe toggle arms,.preferably extends through a thimble 107 in the block97 to tie the toggle arms, the thimble affording a free mounting onwhich the block may turn to insure free movement of the block and arms.The bolt 103 carries a. thimble on which the head 104 pivots to providefree movement and space theitoggle arms. Each centering head 104 isattached to its arm 105 by bolts 110 and has a socket 111 in its upperface, compris ing a circular seat 112 adapted for snugly seating a.bearing pin 113 (Fig. XV) on a saddle 114 that is suspended from therear axle of an automobile, and` a tapering mouth 115 that is adaptedfor guiding the head to place on the pin 113. The pin 113 :is carried inthe depending ears 116 of the a vehicle spring, this part oftheequipment,

except forthe body ofthe block 114, being y found on motor cars, ln eand siffenblo'ck 114r` 'l pre-ft ne with a'strap 121 which led t" blockthrough the .cned to part (not "ho'wnl parent shaft 915 i r d. .es

seating the shaft here l me motor car;

ca chueca, t terfere im the car would in.-

tent as to in fuel. To obsupport the front r aoove the front 'Wheels ,arWheels, so that the trace -fniliciently to compensate lon of the rear ofthe car.

he motor car rests at an int driven onto the frama but mtal positionwhen jacked the motor car on the ,'...ially and prevent itsdisplacement, l have at the front of the frame -o op heads 124,preferably cast to llt u rhin the channels of the side beams L, theblocks being substantially' triangular and having arcuate rear faces torecelje impact from `the frontwheels of the car. The blocks 124 may beadjust ed to the frame to adaptthe frame to motor cars of different.make and Wheel base by providing the underside of each block with aflanged head.12G(Fig. XXV) that is adapted for projection through theslot 5 formed by the spacing of channel members of the side frames sothat the langes126 on the head engage the underside of the .beam andholdthe block to its seat. The

provided block also be attached to the frame by.'-

bolting or otherwise. As the Wheel 'bases of most motor cars are' ofIdifferent length,

the frames may be provided with perfora y of flexibility in the' frame,I utilize individ-v ual front axles -for the steering Wheels, eachcomprising a steel shaft 130' (Figs. VII and XXII) bent to a right angle130 and hav.-

ing-an elbow 131 cast thereon` The elbovsr 181 has end sockets 132 andfitting over iat with i ve wheels of the i ,andere 'the spindle isacollar 134 having an ear.; seated in a socket 132m hold the collar".aga-inst rotation on the axle, orratherto` induce rotation of thespindle with the col lar5 as it is to this collar that the steeringmechanism is attached asy presently described. l

Erl o mounted on-the vertical spindle, is a bearing' 1236, having a head137 which bears against the underface of a cross beam 9 of .75 the mainframe and is Y rigidly attached 'thereto by bolts that extend throughapertures in the beam parts and suspend the be ng. The axle extends upthrough the cross beam into a cap 138 that is seated on said beam, and acotter pin 139 extends through an aperture 140 in the top of the axlemember to support the axle on the cap and prevent the same from droppingthrough `its bearing, should, the frame be lifted from the groundsupport. The ground Wheel 141 is lrotatably mounted on the horizontalmember of the shaft and heldin place by a Cotter pin 142 that extendsthrough an aperture 143 in the endof the axle in the customary manner.vThe anglel membersof the axle are of equal length so that should thebearing member Wear it may be reversed, the socket 132 in the end of theelbow facing the Wheel being idle but receiving the lu@ on collar 134when the axle is reversed. 'lie .wheel141 is preferably adapted forfield Work by the application of an anchoring flange 144 to its rim,

in.v

ist4

the said flange having a lateral rail 145 seat'- 1,004

ing on the wheel rim and attached thereto by bolts 146. With thisconstruction'the flange Will travel in a furrow and automatically guidethe tractor. y

The steering mechanism is connected with 105 the collar 134 on thespindle by straps 147' and 148 which are attached to. ears 149 andv 150on the collar, preferably by bolts 151 and 152, the strap 147 leading tothe Amain steering mechanism through `a link 154 and 110 the strap 148being attachedto the connect- 'ng rod 155, Wherebyboth front axlesv areoperated synchronously through the cole-1 nection. `It is apparent thatWhile both axles.have the connectingstrap 148, but one 115v of the axlesneed have thejmain, steering connection`147, as operation. of one of theaxles by the steering mechanism will 4operate the other through 'the'connectingrod. The steering link 154 is provided, at its rear -120 end,and preferably through` a pin and ,collar.connection-154, (Figs. I, VIIIand X),

-Wth a rack 156, which extends through the 'front and ,backslots-157-158 in a box 159 that is suspended from the cross beam l34125.

at about the centerof the frame. The beam 84 preferably comprises. achannel .iron

which may be connected at different points. with eachmember of the sidebeams, as its' location at thecenter of the frame willn'ot 1 3'0 impartundesirable rigidity to the frame and interfere withits :tiexibleaction. The box 159 1s preferably provided with lips 162 'which projectup intdthe channel of the beam 34, bolts .163,.Which'attach the `box /to5 the beam, retain the Fips snugly against the' Thel teeth 164v on`underside of-gthe beam. the side of the rack bar 156 engage a' spurwheel 165 that is keyed on a vertical 'shaft' 166 rotatably mounted inthe boxing and held against vertical displacement by a cotter pin 167that may bear against the bottom of the box, thefrack bar being held inmesh with the spur wheel by rollers 168that are rotatably mounted onpins 169 carried( by ears 169 on the box. The movement of the rack baris free to provide easy manipulation of the steering axles through themechanism which I will now describe.

The shaft 166 extends -upwardly along a standard 17() that is attachedto the beam 34, preferably by a bracket 170 (Fig. IV)

. and is journaled at its upper end in a bracket 171 carried by saidstandard. The standard is alsobraced by an arm 172 that istixed theretoand4 to the angle member 41 that carries the local jack shaft. Keyed onthe upper end of the steering .shaft 166 is a bevel gear wheel 178 andmeshing with said gear wheel is a pinion 174 on a. pin 175 that isjournaled iii the bearing 176 on an arm 177 preferably forming a part ofthe.

bracket 171. Fixed on thepin 175 is 'a steering wheel 178, having ahandle 179 whereby the wheel inay be easily operated' by the occupantofthe motor car when the car is superimposed on the carrying frame andproperly located thereon.

In order to secure suliclcnt power from the motor car for the purpose ofaccomplishin'g the results desired from the apparatus, itis necessarytorun the motor at high speed and gear the same down to se- Continuedoperation of the motor'under such conditions in some cases requiresadditional cooling as follows:

J ournaledin universal bearings 180 (Figs. V and XXVI to XXX) on vtheframe is a shaft 181, the rear end of which extends ltlirough a gearhousing 182 andv carries a beveled gear wheel 183 which constantlyVmeshes with the bevel gear face 184 on a wheel 185 which is mounted ona stub shaft 186 in the gear housing. The wheel'185 also hasperipheralgear teeth 187 which are adapted. tomesh with a gear wheel188that is slidably keyed on. an extension'53 of the adjacent jack shaft53, so that when the mechanism is in operation and the gearsin thekhousing 182 in mesh, the fan shaftis constantly operated. The gearlwheel 188 on the jack shaft may slide on the sha-ft and is providedwitlrashipper lever 190 that eX- tends out through a slot 191 in thehousing and has notches 192 adapted for selective engagement with theedge of the slot to hold vthe gear wheel in functional or non-functionalrelation with the fan shaft gear, the

, lever being yieldingly held in adjusting positionby a spring 193thatisiixed on the housingand engages the shipper lever. At the-forward endofthe shaft 181 is a belt wheel 195 (Figs. VIV' and V) and runningover'said wheel is a belt 196, which also runs over the wheel Y197 on ashaft 198 that isA the superimposed motor car, is a fan 201',A

. on the cross bar 201.

whereby a cooling blast is delivered intothe radiator when the apparatusis in use. The standard 200 is braced from the main frame by anadjustable bar 203 that is preferably anchored to the front cross beam 9by a pin 204 on a bracket 204 on said beam. The standard is also bracedradially in the line of'belt tension bya rod 205 that is anchored at itsupper end in a yoke 206 on the bracket 207 that carries the fan shaftbearing, and at its lower end is connected with a pin 208 One or both ofsaid afdjustable brace rods .may effect its adjustment through a turnbuckle 209, although such specific adjusting mechanism is not essential.

-As the movement of the assembled tractor l gearing heretoforevmentioned, it is preferred,

facilities which I have provided forv when takingpthe tractor to andfrom a point .of use, to tow the frame from the motor car. This ispreferably effected th rough a tow bar 211 (Figs. VII and XXVI) that ispivotally mountedon the boss 212 on a block 213 that 4is suspended fromthe front axle beam 9 by a bolt 214.- The bolt 214 carrying awashe'r 215that serves to support the tow bar. while leaving itfree to pivot on theboss and draw thereagainst. The tow bar extendsV .rearwardly from itsbolt connection andis at-l tached to the steering connecting rod 155 byapin or bolt 212. lVith this arrangement the tractor frame may be towedby the'motor car and, when turning a corner. the frame is steered withthe motor car through the connection of the tow bar with the steeringmechanism of the frame. "fj".

To run the car onto and oli of the fra-me, I provide approach runways215',

(Fig.

lis necessarily slow because of the reduction XXIV) preferablycomprising side `angles 216, spaced to form a runway preferably flaredtoward its outer end and having av lliooring composed of a base plate217, transverse tread strips 218 and stifl'eningjangles 219. Each runwayispreferably composed' of two sections. having pivotalconnection througha bolt 220, so that therunways may be folded to occupy the leastpossible space, the rear portion of the outer `end section, tit tingwithin the larger base section. to torni a closed side of 'the hinge. The inner end of the runway is orovided with a hoorl that maytaire overthe rear cross 'oar 22 to support the runway and has latch adapted 'torcoperati fith one of the angle bars 'of the relative side traine toregister the reinovabiie runway with the permanent runthereof.

v use side or" the f.

vthrougha collar and y `The power developed in the apparatus can beapplied to'other uses, such as stationary mills,y saws or thelilre','throughan auxiliary power attachment that may he mounted on lthe'frame and connected with the driving sprocket oif theniotor car as:follows:

223 (Fig. gl) designates a strap that is suspended from the rear crossbar and 294 designating a strap that is suspended from the side heani ofthe main traine, there being a pair et the straps at each ine. Pivctallymounted on a holt on thestrap 223 an arm 226, the front end oi which isanchored to the `strap 22a4 by a holt 227 that may extend through anyone of several apertures 228 in said strap to iix the elevation ci theupper end of the arm 226 and thereby adaptA the auxiliar.

power mechanism to the drive belt 70. rlhis is the same driving beltthat runs over the sprocket wheel on the jack shaft and it may `beadjusted to the auxiliary power inechanism by location of the holt 227in the proper aperture in strip 224e. A shaft 231 is journaled inbearings 282 (F ig. V) on the arms '226 and fixed on the shaft 231 is abelt wheel 233 over which a belt (not shown) may be run to operate theauxiliary machine.

@ther wheels, like that numbered 234C, may also be applied to the shaftfor any special Also liXed on the shaft 231, within a gear case 235, isa beveled gear wheel 236, which 'meshes with the bevel gear wheel 237 ona shaft 238 that extends forwardly and has universal connection, througha joint 240?- with the ian sha-ift 181 that extendsl from the gear.housing 182, as heretoiore described. It is apparent that the auxiliarypower mechanism may be easily and quickly applied to the main frame sothat it may he used' only when desired and at other times may beproperly stored..

To effect assembly of attachment as a unit, provide for disconnectingthe shaft 238 from the shaft 181 pin joint 241 of any suitableconstruction. l

. registration n avoid lost motion of the belts.

the auxiliary power maarre n Vilith the parts properly constructed andassembled, the use ci? the apparatus is follows:

ming' the use to he that for farm pun poses and the tractor to benormally housed lat a point remote from that oiy use, to bring lield isreached, the removable runways are applied to the rear end of the frame..ln with the in ain runways and the motor car run onto the traine until.its front wheels are stopged hy the abutinentsA 124. lVhen the motorcai.' is in position, drive bolts are applied to the car wheel and jackshaft sprockets and the jack mechanism is operated by the cranlr 122 sothat the shaft 96 is revolved through the worm gear. The revolution oithe shaft carries the blocks 9T upwardly, straightening thel toggles andelevating the centering heads 10a. Upward movement oi the centeringheads carries the soclret' members against the pin 113 on the saddle 114on the rear axle ofthe motor car7 the head centering automatically onthe pin 'to seat the pin in the socket 112. The sockets in the lowerportions ot' the toggle arms more over the shait 96 when the toggle isstraightened, to loclr the jack in elevated position in order to preventaccidental displacement of the parts that might result in 4the loweringot the car prematurely.

l."Vhen the motor car is jacked up as described, the Heating idlers areadjusted to The tractor is then ready for use and the operator takes hisscat in the nictor car as in the ordinary use of the car.

rlhe ordinarycar steering mechanism is .not employed, as there is noconnection between the steering mechanism of the car and that of thefra-ine, the steering being effected wholly through the wheel 17S andthe rack mechanism operated thereby, as heretofore described.

`When the tractor is in operation7 the pull is steady because of theliywheel action of the motor car wheels. y

There is no undue strain on the frame when moving over uneven ground,because of the flexibility in the frame, and the control is effectivethrough the steering mechanisrn.

is the operation ofthe towing, cooling and other parts has beendescribed during the description of the construction, description oftheir use will not be repeated. Neither will any detail mention be madeof the many and varied uses for which the apparatus is adapted as it isapparent or may be developed from experience.

In order that the cooling airfrom the fan 201 may be discharged directlyupon the radiator of the motorvehicle, I have pro-l Y vided anextensible hood which maybe interposed betweenthe fan and the radiator.

The extensible hood is vpreferably supported l having transverse throughopenings near'l rate bracket 245 which fits over the from thelling cap241 on the motor vehicle. 'The' hood is shown as' comprising two 1tl'ibular sections 242and 243 vand these may be secured in an ,adjustedposition by the set screws 244. "`he -sectionfftQ has a erfo-` gllingits respective ends, a recess-midway between its ends and projections inthe bearings to engage one of the throughopenings and the recess. y

2. Av tractor frame comprising front and rear sets of'ground wheels anda body, the body supported higher at one end than at the other, andhoist mechanism at the lower end of the body for raising one end of amotorlvehicle from the frame to space the driving wheels of the vehiclefrom the frame, and means for connecting the power mechanism of the'vehiclewith one set of groundwheels of the frame.

3. A tractor frame vcomprising front steering wheels and rear tractionwheels and a body, means supporting the'body higher above the rearwheels than above the front wheels, hoist mechanism on the rear of theframe engageable with a superimposed motor Vvehicle to raise the rear ofthe vehicle, and means for operatively connecting the power mechanism ofthe motor 'vehicle with the traction wheels ofthe frame.

4. A chassis for tractors having inherently flexible side sills and endsills, thel side sills and end sills being connected one to the other bya single fastening element whereby the entire frame may flex tomaintaintraction for the wheels without imparting twisting stresses to thesills,

L5. A chassis `for tractors having vflexible side sills and end sills,and means for e011-,

necting the side sills to the end sills whereby the entire frame maylexto maintain traction for the wheels without imparting twistingstresses to `the sills.

In testimony whereof I afiix my signature.

cnonen L. scHorinLn.

